Title :
An MSB-first 1-of-N single-track asynchronous Add-Compare-Select unit for Viterbi decoders
Author :
Cheng, Sheng-Yao ; Tang, Chin-Khai ; Lu, Yi-Chang
Author_Institution :
Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
In this paper, a new Add-Compare-Select unit for Viterbi decoder is presented. By implementing carry-save addition and most-significant-bit-first (MSB-First) comparison with 1-of-N asynchronous single track template, the computation speed can vary with different input data patterns, and thus performance improves considerably. A comparison between different circuit styles is also provided, which shows the performance of our design is potentially better than other designs.
Keywords :
Viterbi decoding; codecs; 1-of-N single-track asynchronous add-compare-select unit; MSB-first; Viterbi decoders; carry-save addition; most-significant-bit-first; Asynchronous circuits; Decoding; Delay; Equations; Feedback loop; MOSFETs; Signal design; Timing; Viterbi algorithm; Wire;
Conference_Titel :
Communications, Circuits and Systems, 2009. ICCCAS 2009. International Conference on
Conference_Location :
Milpitas, CA
Print_ISBN :
978-1-4244-4886-9
Electronic_ISBN :
978-1-4244-4888-3
DOI :
10.1109/ICCCAS.2009.5250497
